While Joe Jackson says son Michael will be buried on his birthday (August 29), Michael's mother Katherine reportedly is mulling filing a wrongful death suit.

Police are investigating who is responsible for The King of Pop's June 25 cardiac arrest, and his mother, who has full guardianship of his children, wants justice.

Authorities probing Jackson's death are focusing on Dr. Conrad Murray, his personal physician, who is suspected of giving him the powerful anesthetic Propofol.

"The possibility of a wrongful death action has been floated," Katherine Jackson's lawyer Burt Levitch said. "In that regard, no decision has been finalized."

"Dr. Conrad Murray's name has been floated [as a possible defendant in the potential lawsuit] because he is under investigation," the attorney added.

Katherine Jackson will raise MJ's kids and receive 40 percent of his estate.

Just how negligent was Murray? Police think he may have left the singer unattended after administering the lethal dose, leaving him dead for five hours before a 911 call was placed, during which he tried to "clean up" his actions.

Nevertheless, we emphasize that this is only one theory, and while the investigation is ongoing, the doctor denies wrongdoing and has not been charged.